Verify identity list steps. cot(t)(1-cos^2(t))=cos(t)sin(t)

Remember: We have to work from either the LHS or the RHS.
(Left hand side or the Right hand side)

You should already know this:



You should also know this:



So plugging in both of those into our identity, we get:



Simplify the denominator on the LHS (Left Hand Side)

We get:



LHS = RHS

Therefore, identity is verified.